const compute = {}

//加法：
compute.dcmAdd = (arg1,arg2) => {
    var r1,r2,m; 
    try{r1=arg1.toString().split(".")[1].length;}catch(e){r1=0;}
    try{r2=arg2.toString().split(".")[1].length;}catch(e){r2=0;}
    m=Math.pow(10,Math.max(r1,r2));
    return (compute.accMul(arg1,m)+compute.accMul(arg2,m))/m; 
}
//减法：
compute.dcmReduce = (arg1,arg2) => {
    var r1,r2,m; 
    try{r1=arg1.toString().split(".")[1].length;}catch(e){r1=0;}
    try{r2=arg2.toString().split(".")[1].length;}catch(e){r2=0;}
    m=Math.pow(10,Math.max(r1,r2));
    return (compute.accMul(arg1,m)-compute.accMul(arg2,m))/m;
}
//乘法：
compute.accMul = (arg1,arg2) => {
    var m=0,s1=arg1.toString(),s2=arg2.toString();
    try{m+=s1.split(".")[1].length}catch(e){}
    try{m+=s2.split(".")[1].length}catch(e){}
    return Number(s1.replace(".",""))*Number(s2.replace(".",""))/Math.pow(10,m)
}
//除法：
compute.accDiv = (arg1,arg2) => {
    var t1=0,t2=0,r1,r2;
    try{t1=arg1.toString().split(".")[1].length}catch(e){}
    try{t2=arg2.toString().split(".")[1].length}catch(e){}
    
    r1=Number(arg1.toString().replace(".",""))
    r2=Number(arg2.toString().replace(".",""))
    return (r1/r2)*Math.pow(10,t2-t1);
}

export {compute}
